 /* .el-table thead.is-group th {
        background: none!important;
    } */
 
 .el-table thead.is-group tr:first-of-type th:nth-of-type(3) {
     border-bottom: none;
 }
 
 .el-table thead.is-group tr:first-of-type th:nth-of-type(3):before {
     content: '';
     position: absolute;
     width: 1px;
     height: 75px;
     /*这里需要自己调整，根据td的宽度和高度*/
     top: 0;
     left: 0;
     background-color: grey;
     opacity: 0.3;
     display: block;
     transform: rotate(-50deg);
     /*这里需要自己调整，根据线的位置*/
     transform-origin: top;
 }
 
 .el-table thead.is-group tr:first-of-type th:nth-of-type(3)>.cell {
     text-align: right!important;
 }
 
 .el-table thead.is-group tr:last-of-type th:first-of-type>.cell {
     text-align: left!important;
 }
 
 .el-table thead.is-group tr:last-of-type th:first-of-type:before {
     content: '';
     position: absolute;
     width: 1px;
     height: 80px;
     /*这里需要自己调整，根据td的宽度和高度*/
     bottom: 0;
     right: 0;
     background-color: grey;
     opacity: 0.3;
     display: block;
     transform: rotate(-52deg);
     /*这里需要自己调整，根据线的位置*/
     transform-origin: bottom;
 }
 
 .el-table td.is-right,
 .el-table th.is-right {
     text-align: left!important;
 }
 